Turkish Kerchief Solitaire

50 cards are dealt to 10 columns of 5 cards in each. The last two cards are dealt to the first two columns.

The object of the game
To discard all the cards in pairs of the same rank.

The rules
Select pairs of cards of the same rank by using the mouse. Only the bottom cards of columns are available to play. It is also legal to remove a card and the card beneath it if the bottom card has no cards beneath it.
Spaces are not filled.